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Series: NOVA

PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA programs demystify science and technology and highlight the people involved in scientific pursuits.

Related: Episodes

The Vikings were among the fiercest warriors of all time, known for creating the ultimate weapon of their era: the Ulfberht sword. Using cutting-edge science, NOVA reconstructs the Ulfberht to reveal the secrets of a sword both feared and prized.

A remote, bleak speck of rock in the middle of the Pacific, Easter Island, or Rapa Nui, has mystified the world ever since the first Europeans arrived in 1722. How and why did the ancient islanders build and move nearly 900 giant statues or moai, weighing up to 86 tons?